Some publishing systems auto-generate this value from the first few words or
first paragraph of the entry. Other publishing systems misuse it to include
the full content. In the latter cases, Universal Feed Parser ought
to detect it and put the value in entries[i].content instead, but
it doesn’t.

Note

Some feeds include both a summary and description element for each entry. In
this case, the first element will be available in entry['summary'] and the
second will be available in entry['content'][0].